1978•The Journal of the Japanese Association of Mineralogists Petrologists and Economic GeologistsOpen access

Petrologic study of sillimanite-garnet-cordierite-bearing pegmatite intrusives from Takato, central Japan.

Akira Ono

Abstract

Sillimanite+garnet+cordierite+graphite-bearing pegmatites were found in Takato. Chemical compositions of constitutent minerals are similar to those of the surrounding metamorphic rocks. Mineral assemblages, chemical compositions of minerals and modes of occurrences of the Takato pegmatites suggest that the pegmatite magmas were produced by partial melting of high temperature parts of the Ryoke metamorphic rocks and rised to the crustal level of upper amphibolite facies.

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Key concepts: Pegmatite, Sillimanite, Cordierite, Geology, Geochemistry, Metamorphic rock, Metamorphic facies, Partial melting